I can't understand what the following question asking, can anyone explain it to me? Q1 Find the law of transformation under Lorentz transformations of an anti-symmeric 4-tensor. "What is the law of transformation means?" Q2 Find the special relativistic law of the composition of the velocities by using the Lorentz transformation properties of the 4-velocity. "Does it mean that I have to give out the components of velocity or else? " Please help me!!